47 Meters Down (2017)

During a vacation in Mexico, two sisters find themselves in a terrifying predicament when their shark observation cage malfunctions and plunges them to the ocean floor. Surrounded by menacing great white sharks and facing dwindling oxygen supplies, the sisters must summon their courage and ingenuity to escape before their time runs out. With less than an hour to reach the surface, their bond is tested as they confront their fears and the harsh reality of their situation. Tension mounts in this gripping underwater thriller where survival hangs by a thread.